Deborah Copperud Reported On One Of The Most Difficult Races In The World

by | February 2, 2026

For Minnesota Monthly, Deborah Copperud wrote about the Arrowhead Ultra 135. Copperhud told Study Hall, “As someone who loves short distance winter jogs, I’ve been fascinated by the Arrowhead 135 Ultra, one of the world’s toughest and coldest endurance races. I spoke with ultra athlete Emily Kratz, about how she stays warm and motivated while running on snowpack for days at a time. I also interviewed Daniel Craighead, a professor of exercise physiology, about how athletes survive the race’s harsh conditions.”

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